Polythene

Wrap the pots in polythene to retain moisture.

Widespread use of polythene represents an environmental problem, as it is not biodegradable.

Well, you should see Polythene Pam, / She's so good looking but she looks like a man. / Well, you should see her in drag, / Dressed in her polythene bag. / Yes, you should see Polythene Pam.

All that was needed [to make a hula hoop] was a bag of high-density polythene dust, a handful of two-inch wooden plugs, half a pound of wire staples, and the help of a man with an extrusion machine, which simply meant anyone who could make a length of plastic hose.